The Loa'Sur is a river that runs through the Lesser Faydark. It originates in the central north of the zone in the satyr area, then flows mostly south. Follow the river to its headwaters to reach The Emerald Halls. There are few aggressive creatures in the river, making it a mostly safe way to travel the zone, but the banks are steep and it can be difficult to find a way out.
The /loc refers to a bridge crossing the river, but anywhere on the river counts for the discovery.